Not sure how long this has been, as its been a while since I've done any Villas but you cannot enter Villa Amiel.
There's no icon that normally appears on the doorway you can click to enter, just acts like a inaccessible texture based door as on most of the other buildings.
Hopefully Funcom fixes this soon so people can do quests/achievements in there. The rest of the Villas seemed to be working as normal.